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Re: Hosts losing access to NFS share

Hi Frank, I obtained these from a Netapp KB I believe some time ago. Let me see if I can dig it out. Cheers

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Re: Hosts losing access to NFS share

Hi, Here is couple of KB from VMware which talks about NFS advance settings configuration. http://kb.vmware.com/kb/2239 http://kb.vmware.com/kb/1007909 http://kb.vmware.com/kb/1012062 Here is link for...

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Re: Hosts losing access to NFS share

Thanks memaad I was just about to post the links up for Frank

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Re: Hosts losing access to NFS share

Lot's of reading for the Christmas break!By any chance, do you have the NetApp KB too? Many thanks,Richard

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Re: Hosts losing access to NFS share

Hi Frank, It wasn't actually a netapp KB it was the ones that have been posted already. I was also advised by our third party to configure the settings. We have had them in place and have experience no...

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Re: NL-SAS for replication, low duty VM's

 You should expect no more than 50% of the performance compared to the same RAID/# of drives of regular 10K SAS.  If that meets your requirements, great.  Any feedback is good feedback, thanks.  But...

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Re: NL-SAS for replication, low duty VM's

Say you had 10 15K SAS drives in an R10 set.  At a pretty common expectation of about 180 IOs/sec/drive, you'd expect to peak out at about 1300 IO/s.  With 7.2K NL-SAS drives, you can expect more like...

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Re: Hosts losing access to NFS share

Hi.. Depending on your setup you might also want to check Flow Control settings on connected pSwitches and host pNICS.. According to NetApp flow control should now be disabled on modern network gear......

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Preparing physical Network for NFS end-to-end

If I am using NFS in an environment for the first time, what considerations does the network team need to make to prepare the physical network end-to-end for this? The requirements for using NFS in...

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Re: Advice -- migrating from VMFS3 to VMFS5

Your reasoning is solid. When at all possible, I advise to go with a plan to re-create the VMFS5 datastores from scratch. I've written on reasons why here:...

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Re: Preparing physical Network for NFS end-to-end

You will probably want 9k jumbo frames end to end.  Also notable is that the NFS should be layer2 (non-routed) although L3 is supported now (technically it always worked but is generally not a good...

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Re: Preparing physical Network for NFS end-to-end

Mike Nisk wrote: You will probably want 9k jumbo frames end to end.  Jumbo frames are for BLOCK level storage, LUN (iSCSI \ Fiber).  NFS is a FILE level, and jumbo frames will not have much impact......

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Re: Preparing physical Network for NFS end-to-end

You also want to think about making NFS separate from VM traffic.. just like you would for iSCSI.  NFS works better on it's own segment rather than trying to mix it with your other network traffic,...

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Re: Preparing physical Network for NFS end-to-end

Hi, This doc contians best prtactise for NFS with vSPhere , also this doc contain advance setting configuration for NFS when using with vSPhere...

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Re: Advice -- migrating from VMFS3 to VMFS5

Thank you both for your comments.  They have helped me resolve my approach.For the smaller datastores I will move the VMs off, recreate datastores, then move the VMs back again.For the larger...

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Re: Hosts losing access to NFS share

Frank White wrote: These numbers look really interesting and we comply with almost none of them(hehe... too funny!) Best way to apply those NFS best practice settings for ESXi hosts is using the NetApp...

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Re: Hosts losing access to NFS share

Depending on your setup you might also want to check Flow Control settings on connected pSwitches and host pNICS.. According to NetApp flow control should now be disabled on modern network gear......

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Re: Preparing physical Network for NFS end-to-end

Ideally one should try to minimize latency by avoiding multiple hops between the array and the ESXi hosts. Other considerations apart the mentioned above would be use of Beacon probing to detect...

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Re: NL-SAS for replication, low duty VM's

There are plenty of peopl running VM's on SATA disks.  (thinks IBM XIV) but to get the performance you need to front end this with some Flash,  if you need cheap but perfromant SAN,  have a look at...

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Re: Connect two mirrored LUNs to ESXi

Since both are mirrorred luns and assuming that they report the same serial number etc. wouldn't ESX treat the two luns as multiple paths to the same LUN ? If so in case of failure of one of the LUNs,...

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